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Simple Application Controllers
SMS/SMR/CD Functions and the Modem Setting 2
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2.4 The CD Function Block
In case a GSM modem or an analog modem that supports Calling Line Identification
Presentation (CLIP) is called, the number of the calling partner is sent by the modem by the AT
notification "+CLIP" attached to the RING notification.
α
2 extracts the callers's number after a
given number of RING notifications.
In case the numbers of digits of both phone numbers and the phone numbers itself are equal,
the CD FB output is switched on.
To enter or edit the SMR parameters, double click on the icon to open the Short Message
Receiving dialog box described in Section 2.4.1.
A) The Input Signal
Enables the CD FB operation.For normal operation the Input must be ON.
When Input is OFF, the output is hold and the function block doesn't check caller's number.
Input is ON when left open (not connected).When Reset and Input are ON at the same time,
only Reset becomes active.
B) The Reset Signal
Resets the bit output when ON
Reset takes priority over Input and takes priority over an incoming call.Thus, when Reset is
ON, an incoming call has no affect.
Reset is OFF when not connected.
C) The Output Signal
Bit output.
The output is set ON, when the caller's number is equal to the stored phone number and Input
is ON.The output state is hold, when Input is OFF, and it is reset (set OFF), when Reset is ON.
A)
(C
B)